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公开(公告)号：DE3445518A1
公开(公告)日：1985-06-20
申请号：DE3445518
申请日：1984-12-13
Applicant: RCA CORP
Inventor： CHEN HSING-YAO , HUGHES RICHARD HENRY
Abstract: The present invention provides an improvement in a color picture tube having an inline electron gun for generating and directing three inline electron beams, comprising a center beam and two outer beams, along initially coplanar paths toward a screen of the tube. The beams pass through a deflection zone adapted to have two orthogonal magnetic deflection fields established therein. A first of the fields causes deflection of the beams perpendicular to the inline direction of the beams, and a second of the fields causes deflection parallel to the inline direction of the beams. The improvement comprises the electron gun including four magnetically permeable members located near the exit of the electron gun in a fringe portion of said deflection zone. A first and a second of the members are located between the center beam path and a first and second outer beam path, respectively. A third and a fourth of said members are spaced from the first and second members, respectively, and are located on the outside of the respective outer beam paths. The first and third members and the second and fourth members have means for bypassing a part of the fringe portion of the first of the two orthogonal magnetic deflection fields, at the members, around the respective outer beam paths, while allowing another part of the same fringe portion, at the members, to pass through the respective outer beam paths. The first and second members have means for bypassing a part of the fringe portion of the first of the two orthogonal deflection fields, at the members, around the center beam path, while allowing another part of the same fringe portion, at the members, to pass through the center beam path.
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公开(公告)号：GB2140968A
公开(公告)日：1984-12-05
申请号：GB8410638
申请日：1984-04-26
Applicant: RCA CORP
Inventor： VANHEKKEN FRANS , CHEN HSING-YAO
Abstract: An inline electron gun for a cathode-ray tube includes a plurality of cathodes, a control grid, a screen grid and a main focus lens arranged successively in alignment with the cathodes for focusing a plurality of electron beams along beam paths onto a screen. The screen grid has a functional grid area with a given thickness. A recessed portion is formed within the functional grid area. A plurality of apertures are formed within the recessed portion of the screen grid. The recessed portion is surrounded by a peripheral rim which is in proximity to the outer apertures thereby affecting the electrostatic field in the vicinity of the outer electron beam paths.
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公开(公告)号：DE3402857A1
公开(公告)日：1984-08-02
申请号：DE3402857
申请日：1984-01-27
Applicant: RCA CORP
Inventor： CHEN HSING-YAO
Abstract: An inline electron gun in a color picture tube is improved by the addition of two slots that are spaced sufficiently close to and inward from the two apertures in a portion of the screen grid electrode facing an accelerating and focusing electrode. The slots cause a distortion of the electrostatic field formed between the two electrodes at the two apertures. The field distortion compensates for an opposite distortion within the main lens of the electron gun.
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Patent Agency Ranking
公开(公告)号：DE3225632A1
公开(公告)日：1983-02-03
申请号：DE3225632
申请日：1982-07-08
Applicant: RCA CORP
Inventor： CHEN HSING-YAO
Abstract: An improved color picture tube has an inline electron gun for generating and directing three electron beams, a center beam and two side beams, along coplanar paths toward a screen of the tube. The gun includes a main focus lens for focusing the electron beams. The main focus lens is formed by two spaced electrode members each having three separate inline apertures therein. Each electrode also includes a peripheral rim. The peripheral rims of the two electrodes face each other. The apertured portion of each electrode is within a recess set back from the rim. The width of the recess in at least one of the electrodes is wider at the center beam path than at the side beam paths, measured perpendicular to the plane containing the electron beam paths.
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公开(公告)号：GB2101803A
公开(公告)日：1983-01-19
申请号：GB8219507
申请日：1982-07-06
Applicant: RCA CORP
Inventor： CHEN HSING-YAO
Abstract: An improved color picture tube has an inline electron gun for generating and directing three electron beams, a center beam and two side beams, along coplanar paths toward a screen of the tube. The gun includes a main focus lens for focusing the electron beams. The main focus lens is formed by two spaced electrode members each having three separate inline apertures therein. Each electrode also includes a peripheral rim. The peripheral rims of the two electrodes face each other. The apertured portion of each electrode is within a recess set back from the rim. The width of the recess in at least one of the electrodes is wider at the center beam path than at the side beam paths, measured perpendicular to the plane containing the electron beam paths.
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公开(公告)号：PL218503A1
公开(公告)日：1980-08-11
申请号：PL21850379
申请日：1979-09-25
Applicant: RCA CORP
Inventor： CHEN HSING-YAO , HUGHES RICHARD H
Abstract: The gun, for use in a television picture tube, comprises a cathode, an apertured control grid, and an apertured screen grid aligned in the order named. The screen grid aperture comprises a rectangular slot portion facing the control grid and a circular portion facing away from the control grid. The slot portion of the aperture, which has a width 2-5 times its depth, creates an astigmatic field that produces underconvergence of the electron beam in the vertical plane only, whereby to avoid and/or compensate for vertical flare distortion of the beam spot at off-center positions on the image screen.
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公开(公告)号：DD143125A5
公开(公告)日：1980-07-30
申请号：DD21215679
申请日：1979-04-11
Applicant: RCA CORP
Inventor： HUGHES RICHARD H , CHEN HSING-YAO
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公开(公告)号：DE2938769A1
公开(公告)日：1980-03-27
申请号：DE2938769
申请日：1979-09-25
Applicant: RCA CORP
Inventor： CHEN HSING-YAO , HUGHES RICHARD HENRY
Abstract: The gun, for use in a television picture tube, comprises a cathode, an apertured control grid, and an apertured screen grid aligned in the order named. The screen grid aperture comprises a rectangular slot portion facing the control grid and a circular portion facing away from the control grid. The slot portion of the aperture, which has a width 2-5 times its depth, creates an astigmatic field that produces underconvergence of the electron beam in the vertical plane only, whereby to avoid and/or compensate for vertical flare distortion of the beam spot at off-center positions on the image screen.
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